The water quality in hydronic systems directly affects the performance and life expectancy of the components in the systems. Total dissolved solids (TDS) and pH... READ MORE
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Over the last few weeks the Monday Morning Minutes posts have looked at pumping issues with multiple condensers and pumps. One of our most-received questions... READ MORE
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Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. Pleasants
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August 22, 2016
Over the last few weeks our Monday Morning Minutes posts have looked at pumping issues with parallel, equal-sized condensers and pumps. This week we will look... READ MORE
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Chilled water condensers are normally operated as constant-flow devices and the pumps serving them are constant-speed. Why would you ever use a variable-speed drive for... READ MORE
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In part 1 of this series we offered an example condenser water pumping system. The design of this example is 800 GPM per condenser for... READ MORE
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Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. Pleasants
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August 1, 2016
Applying a single constant-speed pump for each condenser in a chilled water application is a normal design for the HVAC engineer. The chiller manufacturers suggest... READ MORE
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The last four segments of the R. L. Deppmann Monday Morning Minutes introduced the valuable PLEV tool from Bell and Gossett. The part load efficiency... READ MORE
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When looking at Bell and Gossett pump selections, we often find higher part load efficiency (PLEV) pump choices are to the right of the BEP, or best... READ MORE
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In the last two Monday Morning Minutes, we introduced the PLEV, or Part Load Efficiency Value, from Bell and Gossett. When we use part load... READ MORE
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Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. Pleasants
 / 
June 27, 2016
In the last Monday Morning Minutes post, we introduced the PLEV, or Part Load Efficiency Value from Bell and Gossett. This week we look at some... READ MORE
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